An equivalent complex permeability model for litz-wire windings

@article{Nan2005AnEC,
  title={An equivalent complex permeability model for litz-wire windings},
  author={Xi Nan and Charles R. Sullivan},
  journal={Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005.},
  year={2005},
  volume={3},
  pages={2229-2235 Vol. 3}
}
  • X. Nan, C. Sullivan
  • Published 2005
  • Business
  • Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005.
Previous methods for calculating power loss in litz-wire windings usually assume very fine strands such that the diameter of strands is much smaller than skin depth. In this paper, we present a method for calculating proximity-effect loss in litz-wire windings. This method uses an equivalent complex permeability model of the winding to describe the proximity effect. We first obtain a permeability model for litz-wire bundles, then use homogenization techniques to find the average permeability of… 

Equivalent complex permeability and conductivity of Litz wire in wireless power transfer systems

In this paper the skin and proximity effect losses for Litz wire winding used in wireless power transfer system is calculated using exact 2-D method. Based on those losses the equivalent complex

Optimization design of solid insulation multi-winding high frequency transformer

  • J. YangZ. LiangR. Li
  • Physics
    2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)
  • 2021
Several typical transformer design methods are introduced first, and their main characteristics and applications are compared and analysed. On this basis, an optimal design scheme of solid insulation

Fringing-Effect Losses in Inductors by Thermal Modeling and Thermographic Measurements

The fringing-field phenomenon can have a significant impact on power loss and temperature distribution in windings of magnetic components with an air gap. The magnetic flux in a core does not cross

Optimization of a transformer used for LLC resonant DC-DC converters for photovoltaic cells

This paper proposes a method to improve the power efficiency in the half-bridge LLC resonant DC-DC converter. The optimum design of a transformer is discussed to improve power efficiency. The

Modélisation électromagnétique 3D d’inducteurs multibrins – Développement d’une méthode intégrale parallélisée

Afin de permettre l’utilisation de hautes frequences dans le domaine du chauffage par induction industriel, l’emploi d’inducteurs multibrins est envisage. Or, les pertes occasionnees dans ces

Calculation of ohmic losses in litz wires by coupling analytical and numerical methods

Up to now, litz wires with many (several hundreds) strands are simplified in complex systems such as transformers or coils to make simulations feasible. However, frequency dependent losses of litz

Analytical model for effects of twisting on litz-wire losses

Litz wire uses complex twisting to balance currents between strands. Most models assume that the twisting works perfectly to accomplish this balancing, and thus are not helpful in choosing the

Simplified design method for litz wire

A simplified approach to choosing number and diameter of strands in litz wire is presented. Compared to previous analyses, the method is easier to use. The parameters needed are only the skin depth